Frequently Asked Questions


  • Will the DPS Tank wash process harm painted surfaces?
    Most painted or colored plastic surfaces will not be damaged by minimal contact with the ready-to-use solutions, however re-waxing will be necessary.
  • How many Tanks can be cleaned with the same solutions?
    The solutions may clean up to 2 tanks but the final rinse solution must always be new solution, and this depends upon the condition of the tanks, as well as the amount of gun, varnish & hydrocarbon residual in the tanks.
  • Can small parts such as fuel injector manifolds, carburetor bodies, injector rails, nozzles, fuel tank senders and other fuel system components be cleaned with the cleaning process ?
    Yes, small parts can be soak cleaned to remove fuel residues, this is a good second use for the previously used tank wash solutions. However electric components such as fuel pump motors may be damaged by immersion in the water solutions.
  • Can the DPS Tank Wash process be used for the cleaning of fuel filters or emission control vapor recovery charcoal canisters ?
    No, the absorbent material in the filters or canisters will be damaged by the water solutions, and the process will not be effective.
  • Some fuel tanks are made from Aluminum, Stainless Steel, Nylon and plastic blends. Is the DPS Tank Wash process effective on all of these tank materials ?
    Yes, the process is effective on all materials, and some brightening of aluminum tanks is expected to occur. Natural color Plastic tanks which are manufactured from Polyethylene blends may experience some brightening as the fuel discoloration is removed. Plastic Tanks that have had exotic fuels in them should be washed utilizing the Hot water pre soak process to assist the cleaning process. Rubber seals and gaskets will not be damaged by the cleaning solutions, however old style Cork gasket materials and some adhesives may be weakened by the cleaning chemicals.
  • Is rusting of cleaned fuel tanks a problem with this “water based” process ?
    The cleaners have a rust and corrosion inhibitor package built into them, and it is effective for an extended period, however in high humidity or salt environments mild surface rust may form. The cleaning process will generally remove mild rust and corrosion deposits, and the wetting action will remove hydrocarbon residues from surface varnish & rust deposit.
  • Can Fuel tanks that have had 2-cycle oil in them be cleaned with the DPS cleaning process ?
    Yes, the cleaning process will remove the gas & oil residues.
  • Are old Lead – Zinc coated tanks damaged by the process ?
    Our testing indicates that some lead oxides may be removed when hot water is used for cleaning old fuel tanks. The process should be used with care when servicing lead coated tanks. In tanks that are less than 20 years old very minimal lead traces have been found in the spent cleaning solutions, and the tanks still maintain a sufficient coating to resist corrosion. Our testing also found lead residues in straight hot water, presumably from the hot water loosening manufacturing residues. (Less than 2 ppm/gal)
  • Can the DPS Tank Wash Kits be shipped by Air Freight ?
    Yes, The chemicals in the kits are safe for air shipping.
  • When an order is given for a Tank Wash Kit, how long does it take to get the product to the service location ?
    Factory direct shipped product orders are shipped within 2 days of having the order approved for shipment. Individual kit orders are shipped Priority, and continental US customers generally receive the kits within 4 days. Warehousing Distributor Stocking orders are generally shipped within 1 week, and Direct Location Drop Ship (DLDS / Business to Business) orders are shipped within 2 days of the order being authorized & confirmed for shipment.
  • Are Special sizes of kits available, and does DPS have minimum order levels for custom application kits?
    Yes, custom size kits and special packaging are possible, with minimum order levels.

Diversified Petrochemical Services, Inc.